A sequence of development defects within the overpass triggered the accident that left 26 individuals useless, a probe has discovered.
An investigation into the Mexico Metropolis metro catastrophe has revealed a sequence of development flaws within the overpass that collapsed, killing 26 people and prompting offended calls for for justice.
The preliminary report launched on Wednesday by Norwegian engineering firm DNV stated a structural failure had triggered the elevated part to present manner on Might 3, bringing a passenger practice crashing down.
The preliminary findings, which had been introduced at a information convention by Mexico Metropolis authorities, recognized various deficiencies within the development course of.
They embody “unfinished and/or poorly executed welding,” inadequate bolts and the usage of several types of concrete.
The specialists additionally discovered deformations and fractures within the beams of the part that collapsed, injuring dozens of individuals and prompting accusations of negligence from devastated relations.
The metro line, the town’s latest, has been tormented by issues because it was opened in 2012.
DNV, which was employed by the authorities to research the causes, plans to ship two extra stories on July 14 and August 30, its Mexico director Eckhard Hinrichsen advised the information convention.
The probe goals to ascertain if the design and supplies had been applicable, if the development was carried out in keeping with the design, and if the operation and repairs had been elements within the crash.
Prosecutors are additionally investigating the catastrophe however have but to publish their findings.
Mexico Metropolis Mayor Claudia Sheinbaum stated she would put collectively a technical staff to bolster and restore the 24.5km (15-mile) line.
The furore over the crash has engulfed two of President Andres Manuel Lopez Obrador’s political proteges and main contenders to be his left-wing occasion’s candidate within the 2024 presidential elections.
Sheinbaum faces questions on whether or not the community has been correctly maintained since she took workplace in 2018.
International minister Marcelo Ebrard oversaw the event and inauguration of the road in his former place as Mexico Metropolis mayor from 2006 to 2012.
Ebrard has stated his administrative accountability for the venture ended when he left the job.
The issues within the elevated part of observe grew to become identified after a robust earthquake that rocked the capital in 2017, in accordance with the highest diplomat.
Ebrard launched an announcement on Wednesday defending his function within the metro venture, saying his workplace had held a world tender to pick the development corporations.
It additionally arrange an autonomous public entity to handle the venture in addition to a central committee and a technical subcommittee, and sought recommendation from Mexican engineering establishments, he added.
Mexican billionaire Carlos Slim additionally faces scrutiny over the catastrophe as certainly one of his firms was concerned within the development of the part that collapsed.
Lopez Obrador reiterated on Wednesday earlier than the report’s publication that these answerable for the tragedy can be punished and promised to assist the road’s reconstruction.
He has rejected recommendations from an employers’ affiliation that the accident was linked to public spending cuts.
The authorities have additionally come beneath hearth from one of many metro labour unions, which stated that its earlier warning about harm to the overpass was ignored.
Line 12, also referred to as the Golden Line, was constructed at a value of roughly $1.2bn – 70 % greater than initially deliberate.
In 2014, operations had been suspended at 12 stations alongside the road for simply over a 12 months because of deterioration within the observe, rail fastenings and ties.